I am using parts from AMT's X-Wing Fighter and Monogram's Seaquest Stinger Kits to make the Stiletto.

The first thing I did was to cut off the rounded bottom of the Stinger and replace it with Flat Sheet Plastic.

Next I cut off the Tail Section and removed a Pie-Shaped section from the cut. Then I turned the Tail Up-Side Down and glued it back. This caused the angle of the Tail Section to changed in a downward direction.

Next I cut the bottom edge of the body as shown...

I cut the front off the X-Wing Fighter and carved it to fit the Stinger Body, Up-Side Down. Then I glued it in place...